Balanced hydraulic valve.



PATENTED APR. 17, 1906.

P. HENNEBUHLE. BALANCED HYDRAULIC VALVE.

APPLICATION FILED JUNE 27,1904.

F. HENNBBUHLE. BALANCED HYDRAULIC VALVE.

APPLICATION FILED JUNE 27, 1904.

2 SHEETS-SHEET 2,

fl A r I 14 62; aeaaear 526%67'2 $0121 PATENTED APR. 17, 1906.

FRANK HENNEBOHLE,

PATENT canton.

OF CHICAGO, ILLINOIS.

BALANCED HYDRAULIC VALVE.

Specification of Letters,Patent.

Patented April 17, 1906.

Application filed June 27,1904- Serial No. 214,381.

To all whom it may concern:

Be it known that I, FRANK HENNEBoHLE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Balanced Hydraulic Valves, of which the following is a specification.

This invention relates to valves for controlling the inlet and the outlet to a hydraulic cylinder.

One of the objects of the invention is the production of avalve of this character which shagll be perfectly balanced when being operate i I A further object of the invention is the production of a valve the body of'which is reversible to bring a new setof valve-seats into use when one set has become worn.

The invention further relates to the general improvement of valves of the character mentioned.

In the accompanying drawings, Figure 1 is a top plan view of a valve embodying the features of this invention, the upper end of the operating lever being represented as broken away. Fig. 2 is a vertical central section through the valve on dotted line 2 2 of Fig. 3. Fig. 3 is a horizontal section through said valve on dotted line 3 3 of Fig. 2. Fig. 4 is a similar view on dotted line 4'4 of Fig. 2. Figs. 5, 6, and 7 illustrate my invention as applied to a three-way valve for use in connection with a single-acting hydraulic cylinder. Fig. 5 is a vertical central section through said valve, taken on the plane of dotted line 5 5 of Fig. 7. Fig. 6 is a top plan view of the valve, the upper end ofthe operating-lever being broken away. Fig. 7 is a horizontal sectionalview taken on the plane of dotted line 7 7 of Fig. 5.

In the production of a valve embodying this invention I provide a casing A, comprising valve-chambers A, A A and A and discharge-chambers A A, A and A beneath said valvechambers, which valvechambers and discharge-chambers are connected in vertical pairs by openings A, the upper and lower ends of the walls of which openings are formed into valve-seats A and A. The valve-chambers A and A are con nected by a port A and the discharge-chambers A and A are likewise connected by a port A, said ports A and A extending substantially at a right angle to each other. In one side of the casing is an inlet-opening A,

communicating with the valve-chamber A by means of the port A and at the opposite side of the casing is an outlet-opening A, which by means of the port A communicates with the discharge-chamber A. In the remaining sides of the casing A, I form openings A and A, the former of which is connected by the port A with the valve-chamber A and by means of the port A with the dischargechamber A while the latter opening A is placed in communication with the valvechamber A by means of the port A and with the discharge-chamber A by means of the port A In the upper end'of each of the valve-chambers A, A A and A and the lower end of each of the discharge-chambers A A, A and A is an opening-A which opening is screw-threaded to receive the externally-screw-threaded bushing A Valve-stems B, B B and B are adapted to lie within'the valve-chambers A, A A and A respectively, and are provided upon the valve-seats A Upon each valvestem beneath the closure B are formed radial guide-wings B". The opposite ends of the valve-stems. are screw-threaded for a purpose to appear later herein. Near each of its ends each of the valve-stems is provided with two integral peripheral rings or collars H and B", the outer one, B, being somewhat less in diameter than the collar B A packing ring or washer B is adapted to be slipped over the collar B and to lie in the space between said collars, being held in said space by means of a ring B fitting over the collar B and constituting a piston on the valve-stem within the bushing A Said bushing thus serves as a cylinder for the piston 13 The piston B at the upper end of the valve-stem is held in place by means of a yoke B having a threaded socket B adapted to receive the screw-threaded upper end of the valvestem, a sleeve B being interposed between said piston and said socket. The piston 13 at the lower end of the valve-stem is secured thereonby means of a nut B having an annular flange 13, adapted to contact with the lower end of the bushing A and thus limit the extent of upward movement of the valve stem. A sleeve B surrounds the valve-stem between the piston B and the upper side of the nut B. The nut is locked in position on the valvestem by means of the in B p An operating lever O, bifurcated at its with valve-closures B intended to be seated lower end to form two T-shaped arms C and C is provided for moving the valvestems, the transverse extremities of said T-shaped arms being pivotall connected with the yokes B by means pins C In use the valve is connected through the inlet-opening A with the compressing means and through the openings A and A with the opposite ends of the hydraulic cylinder to be actuated. The outlet-opening A communicates with a discharge pipe. (Not shown.)

Assuming that the hydraulic cylinder and the valve are filled with water under pressure, the operation is as follows: The pressure-water entering the inlet A passes throu h the port A to the valve-chamber A an from this chamber through the port A to the valve-chamber A in which chambers A and A the pressure-water stands. Moving the operating-lever C in the direction of the arrow in Fig. 2 raises the closures B of the valve-stems B and B from their seats A permittin pressure-water to flow to the hydraulic *cy inder through the port A and the opening A. This movement of the operating-lever also permits dischargewater to flow from the opposite end of said hydraulic cylinder throu h the opening A in the valve-casing throng the port A into the valve chamber A and to discharge therefrom into the discharge-chamberA, thence through the' port A and the outlet A A movement of the operating-lever in the opposite direction raises the valve-stems B and B lifting the closures B from their seats A and permitting pressure-water to flow from the valve-chamber A through the opening A", the discharge-chamber A the port A, and the opening A to that end of the hydraulic cylinder which was recently discharged. The movement of the operatin -lever last mentioned also opened the disc arge from the opposite end of said hydraulic cylinder through the opening A, the port A into the vale-chamber A, through the opening 9 into the discharge-chamber A, throu h the port A into the discharge-chamber K and through the port A to the outlet-opening A.

The closure B upon each of the valvestems bein slightly larger in cross-sectional area than t e piston B at the upper end of the valve-stem, the pressure-water standing in the valve-chamber tends when the closure is seated to hold said closure in such position. When the closure is raised from its seat, pressure is exerted upon both sides of the closure and in oppositedirections upon the pistons B at the opposite ends of the valvestem, thereby balancing the valve.

When the valve-seats A become worn, the valve-seats A may bebrought into use by inverting the valve-casing A with relation to the valve-stems B, B B and B.

This may be done by withdrawing the valvestems, (first removing the bushings A the yokes B, andthe nuts B 2) inverting the valve-casing, and replacing the valve-stems,

.yokes, bushings, and nuts. When so inverted, the valve is turned end for end in order to make the opening A the inlet and opening A the outlet.

In Figs. 5, 6, and 7 a hydraulic valve is shown, by means of which pressure-water maybe supplied to and removed from a single-actinghydraulic cylinder. In this modified form a casing D is provided with valvechambers D and D and with dischargechambers D and D connected in pairs, respectively, by means of the openings D the upper and lower ends of the walls of which openings are inclined to form valve-seats D. In one side of the casing are an inlet-opening D and an outlet-opening D and on the opposite side is an opening D, through which the valve may be placed in communication with a hydraulic clyinder. (Not shown.) Valve-stems E and E extend through the valve-chambers D and D respectively, each of said valve-stems having a clcsure E and guide-vanes E. The upper end of each of the stems carries a yoke'E secured to said stem by means of a screw-thread connection. An operating-lever F, having two oppositelyextending arms F and F at its lower end, is connected with the yokes E by means of pivot-pins F in said yokes extending through openings F and F in said arms F and F respectively, the opening F being slightly elongated to permit ofa sliding movement of the pin F therein. The remaining parts of this modified form of valve are the same as in the form shown in Figs. 1 to 4.

In the operation of the valve last described pressure-water enters the valve-chamber D through the inlet-opening D. A movement of the operating-lever F in the direction of the arrow, Fig. 5, permits the pressure-water to pass from the chamber D through the opening D through the discharge-chamber D and thence through the opening D to the hydraulic cylinder. By'moving the operating-lever F in the opposite direction the clo sure E of the valve-stem E is lifted from its seat and water is ermitted to escape from said hydraulic cylinder through the opening D", the discharge-chamber D and the outlet D.

My invention is not restricted to the precise construction and arrangement shown and described herein, as such construction and arrangement may be modified or varied by those skilled in the art without departing from the spirit and scope of the invention.

I claim as my invention 1. In a valve, in combination, a valve-casing having a valve-chamber and a dischargechamber therein alined with each other and connected by an opening, valve-seats being provided at opposite sides of said opening; a cylinder for each of said chambers, alined therewith, said cylinders being removable; a valve-stem extending through said chambers and'cylinders; a valve-closure on said stem for closing communication between the valvechamber and the discharge-chamber, said closure bein adapted to be seated upon either of sai valve-seats; a piston on said valve-stem for each of said cylinders; removable means on one end of said valve-stem for attaching an operating-lever thereto; and removable means on the other end of said stem for limiting the extent of its movement in one direction;

2. In a valve, in combination, a valve-casing havinga valve-chamber and a dischargechamber therein alined with each other; cylinders alined with said chambers and removably secured to the opposite sides of said casing a valve s stem extending through said chambers and-cylinders; a valve-closure on said stem for closing communication between the valve-chamber and the discharge-chamber; two collars fixed with relation to said valve-stem within each of said cylinders; a packing ring adapted to lie between said collars; a ring forming a piston for said cylinder and adapted to fit over one of said collars for holdin said packing-ring in place; and means for holding said ring in place comprising a yoke having a screw-thread connection with said valve-stem.

3. In a valve, in combination, a valve-casing having a valve-chamber and a dischargechamber therein alined with each other and connected by an opening, valve-seats being provided at opposite sides of said opening; bushings having a screw-thread engagement with the opposite sides of said valve-casing and forming cylinders alined with said chambers; a valve-stem extending through said chambers and cylinders; a valveclosure on said stem adapted to be seated upon either of said valve-seats; a piston on said valve-stem for each of said cylinders, said pistons having the same area exposed to the pressure fluid; removable means on one end of said valve-stem for attaching an operating-lever thereto; and a nut on the lower end of said stem for limiting the extent of its opening movement.

4. In a valve, in combination, a valve-cashaving valve-chambers and dischar echambers therein in alined pairs; a cylinder for each of said chambers, alined therewith, said cylinders being removable; a valvestem extending through each alined series of chambers and cylinders; a valve-closure ,on said stem for closing communication between the valve-chamber and the discharge-chamber; a piston on said valve-stem for each of said cylinders, said pistons having the same area exposed to the pressure fluid; a nut on the lower end of each stem for limiting the extent of its opening movement; a bifurcated lever for moving said valve-stems; and a yoke having a screw-thread engagement with one end of each of said valve-stems for attaching said lever thereto. FRANK HENNEBOHLE.

Witnesses:

e L. L. MILLER,

GEORGE L. OHINDAHL. 

